If you've made the switch to watching movies delivered via the internet instead of disc, one of the things that you'll usually give up is interactive special features, but Fox is turning that trend around with its latest repackaging of Avatar. The iTunes Extras Special Edition of the movie goes on sale Tuesday and includes "Green Screen X-Ray" features letting viewers deconstruct the extensive special effects during 17 scenes as they watch, as well as an original screenplay from director James Cameron, his scriptment, and a gallery of 1,700 images. You can get an idea of how the X-ray feature works from the images here and a trailer (in
